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With Avian Flu a Risk, Choose Your Plant Fertilizer More Carefully

For years, gardeners and farmers have relied on one of the world’s most abundant resources to make fertilizer: animal poop. Animal manure is generally free and easy to obtain, either from your own animals or someone else’s. Harvesting animal waste for fertilizer has generally been considered a safe practice—most manure is composted before being applied to the ground, which means…